If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

## Numbers & Operations - The Real & Complex Number Systems 211-217

### Course: Numbers & Operations - The Real & Complex Number Systems 211-217>Unit 3

Lesson 1: Subtracting decimals intro

# Estimating decimal subtraction

This video is all about learning to estimate when subtracting decimals. It emphasizes the importance of rounding to the nearest whole number and doing quick mental calculations to get an approximate answer. It's all about getting comfortable with estimation!

## Want to join the conversation?

• Upvote me please if you do thank you for sporting me
• nah im chillin fam
• but how do you know if you round up or down?
• You look on the digit on the right of the one you're rounding. If that digit is 5, 6, 7, 8 or 9 you round up. If it's 0, 1, 2, 3, 4 you round down.

That's all, hope that helps.
• i dont even know how to do vis
• let me help you! let me give you a example! so 12.93-6.1 forget the point and whats after it, and then turn it the closest number up so it is 13-6 = you know that right? after you get that bring back the point and whats after it and there you go!
• Hi bye
• How does this work I am having a hard time understanding this
• what you can do is for instance 12.93-6.1 round both numbers to the nearest full number which would then be 13-6 and thats bascially it!
• this kind of dose not help.
• how does it not help Anl395005? what are you stuck on? may i help you?
• What’s the use of upvoting or downvoting I don’t get it

And why do people put useless comments saying upvote me
You’re not get anything useful from that
Other than a useless achievement